Knife box for cutting cylinders



July 3.1, 192s. 1,678,896

' H. A. w. woon KNIFE Box Foa c uTTING CYLINDERS Filed oct. s, 1923 ivm 27 rammed July 31, 192s;

HENRY A..WISE WOOD, OIE` NEW YORK, N. Y., .SSIGNOR TO WOOD lN'IEIWSPAPIEIR MA- CHINERY CORPORATION, OF NEIN YORK, Ni fY., AjOORPORATION- OF VIRGINIA..

.KNIFE Box FORCUTTVING CYLINDERS.

)A i *ii-pplcmioii mega octber 3, l1923. serial No. 666364,

This invention relates to aiknifeboxfor'a cuttingcylinder io-operating .with a folding cylinderfor cutting'a web of paper passing between them.

The principal object of the invention isto. provide an improved knife box, removable as a whole, for supporting the cutting knife so that the cheek blocks which surround it will becapable of yielding to permit` the knife to act. The'invention also involves the provision "of wide .staggered springsbacky of the blade and independent 'thereof'.k

and individually'adjustable. y

lReference vis to be had to the accompanyl ing drawings, in which` y y F 1g. 1 1s av fragmentary transverse sectional view of a folding and cutting cyllnder embodying this invention and showing the knife cutting the'web; Y y i Fig. 2 is a similar view lof the parts of the cutting cylinder when nott in cutting position; l

Fig. 3 is an elevation of the cutting cylinder broken away and showing it with the knife box removed at one end;

Fig. 4 is a side view of a part of the knife box;

Figs. 5 and 6 are enlarged views of two forms of cutters that can be used in connection with this invention; and

Fig. 7 is an enlarged section of the cutting blade on the line 7 7 of Fig. 5.

I have shown the invention as .used with the ordinary folding cylinder.10 having'a block 11 therein supporting a yielding Vpad 12 of rubber or the like for the cutting knife to act against. l

I have shown the invention as used with an ordinary cutting cylinder 13 co-operating with the folding cylinder as indicated for drawing the web W between them. In this cutting cylinder, I provide a radialrecess 14 in which is located the knife box 15-16. The knife box consists of two parts as indicated, both of them removably fixed in the recess in the cylinder, the two being connected together by cross studs 18 extending through'the two. Through both of these parts extend and are slidably located rods 20 which are fitted into and positivelyconnected with two plates 21 in a recess 22 in the knife box. In-this recess is located a pair of cheek blocks 23 having a longitudinal space between them for receiving the cutting blade 24. f Therheek blockshave slots`82 for the studs 18. 1

The cutting blade is made up of sections adjustablyfixed to'one of the parts ofthe'v knife box by bolts 17 inslots 19. They are f located in fixed position projectingv beyond the circumference of the cylinder at all times. V In a recess 25 behind a fixed vplate 26 at the bottom of the knife box are a series of springs 27. *Each bearson'two kplates 28 in the recess atits ends. An adjusting screw 29'is` located iny a screwthreaded 'passage 1n the cylinder for engaging each' bottom plate 28 Vand adjusting? the" compression of the spring'27. The springs are wide and in staggered position. i i

. PIATENrfoFFIVC E.

IThese -spri`ngs27V tend to force'the cheek i blocks 23 out' to the'position shown "in 2l at'alltimes. Vhenthe cylinders rotate in contact with each other yintothe position shown in Fig. 1, the cheek block is forced back against the springs by the folding cylind'er and the knifeblade 24 ris thus left in exposed position to cut across theweb and sever it.` f

The knife blade can be formed with ordi-l nary saw teeth as shown in Fig. 5 or with saw teeth having one edge transverse to the longitudinal direction of the knife andthe .other edge 31, which constitutes really the.

cutting edge, at a moreacute Aangle as shown in Fig. 6. The blade is plane on one side,

as shown inv Fig. 7, to ensure a straight clean cut.

In this manner I secure an 'automatic acting knife which is firmly fixed in the cutting cylinder and therefore does not have to move .and yet I can yhave all the advantage of a reciprocable knife. Also I can adjust the compression of the springs 27 in accordance with the Wear of the parts and the reduction of the resiliency of the spring after wear. The leading end of thek web is not tucked in and no corner formed on the web.

Although I have illustrated and described only al single form of the invention, I am aware of thefact that modifications can be fore I do not wish to be limited to all thel details of construction herein shownV and dejscribed, but what I do claim is :f-

i l. Inra web cutting machine, the combina-V tion with a cutting cylinder, of a cutting knife mounted in stationary position therein, and a pair of check blocks vsurrounding lthe knife, of. springs for normally forcing the cheek blocks outwardly, and mea-ns for adjusting the compression yofthe springs arranged to be operated from the side of the cylinder opposite to that of the cheek blocks.'

.2. In a knife boxfor a web cutting de-` vice, the-coiiibination with a cutting cylinder and a pair of members iixed in position therein and having a recess between them,

of a pair of cheek blocks reciprocably mounted in said recess, rods connected with the cheek blocks and extending through the knife box, springs behind the knife boX for pressing on the rods and normally forcing the cheek blocks out, anda blade yfixed vin position on the knife box, said cheek blocks having a space therebetween for the blade.

. 3.v The combination with a cutting cyling der for a web folding machine, of a cutting blade xed therein, radially reciprocable cheek blocks and a setzof springs vforproi jectingthe cheek blocks Which: are so. positioned that those bearing upon one cheek block bear a staggered relation to those bearing upon the other cheek block;

4. The combination with a cutting cylinder for a web folding machine, of a cutting blade fixed therein, a reciprocable cheek:

block on each side of the blade, a set of springs for normallyprojecting the cheek blocks, and means for individually adjusting said springs from the outside of theV cutting cylinder at a point atan distance cir.. cumferentially. from the cheek blocks.

5, The combination with a cutting cylin-`V der 'of Vaweb'folding machine, of a saw toothed cutting lblade smooth on one sideV ly forcing the cheek blocks outwardly, the cheekblocks being so positioned that those springs bearing upon one cheek` block bear a staggered: relation to thoserbearing upon the other cheek blocks, and means' for adjusting the tension of ysaid:springs Which maybe operated withouttheremoval of the said cheek blocks.V A

In testimony whereof I have hereunto Vaf-v fixed my signature. v

" HENRY A. wi'sii woon.y i 

